A spokeswoman said the project was suspended and "any comments on the future of the project would be pure speculation at this stage".

AGL recently advertised the results of a report which looked at the possible health impacts of the proposed northern expansion.

The report, commissioned before the exclusion zone, deemed the project to be a low health risk.

Mr Williamson said the advertisements showed AGL wanted to forge ahead with the expansion.

"They've also told our members at open days they plan to proceed with the application once the Chief Scientist's report into coal seam gas mining in NSW is in," he said.

TThe spokeswoman said:

''The reasons AGL has made the results available are: the local community wanted the study done; the local community has a right to know if there are any potential health impacts from our operations and there is a genuine public interest in the results both in Camden and beyond.''

Susan Jones, of Woodbine, said Stop CSG Macarthur members "ultimately want AGL to withdraw their applications and licence".

But Campbelltown MP Bryan Doyle said Campbelltown residents were safe from CSG mining.

"We set the rules," Mr Doyle said. "They [AGL] comply.

"I can reassure people it won't be happening. There are no loopholes, we've made it clear."

Camden MP Chris Patterson said the idea the project could go ahead was "garbage".

Wollondilly MP Jai Rowell could understand community concerns, but said the project was "absolutely" off the table, a stance backed by the Premier.

Scenic Hills Association spokeswoman Jacqui Kirkby said it was unlikely AGL would want to completely abandon the project.

But she said any push to allow it would be "political dynamite" for the O'Farrell government and lead to a huge public backlash.